When you’re happy and you show it, dogs know it
New test looks at how well canines can read faces
![dog looking at a screen in a lab](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/02/sm_dog_stares_at.jpg?fit=860%2C460&ssl=1)
MAD OR HAPPY Dogs take a new computer-based test to see how good they are at distinguishing between happy or angry human faces.
Anjuli Barber/Messerli Research Institute